I want to create a generic country view that populates data based on the what country i clicked on a map. The current URL looks like:
# Country View URL
url(r'^country/' , 'wiki.views.country',
name = 'wiki_country'),
And the view is:
def country(request):
return render_to_response("wiki/country.html")
This is fine if I want a separate page for each country. I was reading elsewhere that there is no simple way to get a variable from a template in Django. What I would want is for the link in the template not only have the URL, but also a value ("Country Name") that then allows me to dynamically populate a single countryView template.
For specific country which will take id and name of country you can define the URL pattern as:
url(r'^country/(?P<id>\d+)/(?P<name>\w+)' , 'wiki.views.country', name='wiki_country'),
The view will be:
def country(request, id, name):
country = Country.objects.get(id=id, name=name)
return render_to_response("wiki/country.html", {'country': country})
In listing template you can have a link as:
{% for country in countries %}
{{ country.name }}
{% endfor %}
Hope this will lead you somewhere.
Related
I'm currently just learning Django and I'm doing electronic grade book. I have tried everything, have read all the documentation, but nothing helps. It seems I miss a simple logic somewhere. I need to make two pages:
The first one "teacher_interface" is a simple inteface for the teacher with just one drop-down list, teacher chooses the necessary class (i.e 1C, 2B, 4C) and the button "Students", which should somehow take the chosen class from drop-down list input and redirect to the second page "class_students".
The second "class_students" is alike the "teacher_interface", but with the table of students of the chosen class.
I have the One-to-many relation between classes Student and Class:
Firstly, I tried redirecting from "teacher_interface" to "class_students", using in template:
{% url "name" %}
Parts of code: 1) models.py https://dpaste.org/eqxm 2) urls.py https://dpaste.org/eUEO 3) views.py https://dpaste.org/ap8D#L 4) template teacher_interface.html https://dpaste.org/v4m9 5) template class_students.html https://dpaste.org/0gXK
But it shows me: Reverse for 'class_students' with no arguments not found. 1 pattern(s) tried: ['school/teacher/(?P<class_id>[0-9]+)/class/$']
I tried everything, but nothing helped, this and the similar: Django - getting Error "Reverse for 'detail' with no arguments not found. 1 pattern(s) tried:" when using {% url "music:fav" %} I understood maybe this two options of redirect will not work in my case:
{% url 'class_students' class.id %}
{% url 'class_students' class_id %}
I also don't know if it's possible to do on the same page.
So I decided to redirect using redirect from django.shortcuts. I changed my teacher_interface view, so that it took the id of the chosen by the teacher class if request method is POST and redirected. I also made this change in my template "teacher_interface.html":
from
action="{% url 'class_students' %}"
to
action=""
Changed view:
def teacher_interface(request):
class_queryset = Class.objects.order_by("class_number", "group")
class_id = None
if request.method == "POST":
class_id = Class.objects.get("id")
return redirect("class_students", class_id)
context = {
"class_queryset": class_queryset,
"class_id": class_id,
}
return render(request, "teacher_interface.html", context)
But when I choose the class and click the "Students" button, it shows me: Cannot resolve keyword 'i' into field. Choices are: class_number, curriculum, discipline, group, id, student, task, type_of_class, type_of_class_id. Id is certainly is a key, but it tries to resolve only "i".
I tried/read everything here, but nothing works.
I even wrote the default like this:
class_id = Class.objects.get("id", "default")
I am sure I just don't understand properly how to get teacher's choice, pass it to another or the same function and redirect, saving this information. I will be really grateful for you help, even if you just advise what I can read to figure it out.
Ok, you are missing some basic conpects.
on your views.py
def teacher_interface(request):
class_queryset = Class.objects.order_by("class_number", "group")
context = {
"class_queryset": class_queryset,
}
return render(request, "teacher_interface.html", context)
this is correct, you will pass you query to your template
on your template change some things to look like this:
<form method="POST" >{% csrf_token %}
<select name="input1">
{% for class in class_queryset %}
<option value="{{ class.id }}">{{ class }}</option>
{% endfor %}
</select>
<input type="submit" value="Students"/>
</form>
then you need to change your teacher_interface view:
You need to import redirect on your views.py
def teacher_interface(request):
class_queryset = Class.objects.order_by("class_number", "group")
context = {
"class_queryset": class_queryset,
}
if request.method == 'POST':
class_id = request.POST.get('input1') # I'm not sure if this will get the {{class.id}} value, if don't, print(request.POST.get) and check how to get the value
return redirect('class_students', class_id=class_id) # will make a get request on the class_students view
return render(request, "teacher_interface.html", context)
def class_students(request, class_id):
# the parameter need to be 'class_id' because this is what you put on your urls '<int:class_id>', if possible, remove that /class.
# ADD CLASS ID AS PARAMETER, THAT WILL ENABLE YOU TO ACESS AN SPECIFIC CLASS
# Import get_object_or_404 (google it and you will find easily)
class = get_object_or_404(Class, pk=class_id) # this avoid internal server error.
# pass your class on the context
return render(request, "class_students.html")
I would like to show possible choices from ManyToManyField (which I have in Homes model) in the Owners form. I have Owners <--Many2Many--> Homes with custom class HomesOwners. In Homes it works out of the box, I don't know how to make it work in Owners.
I am using Django 2.2.4 with Bootstrap 4 and Postgresql. I started my project based on django-bookshelf project (also just Django and Bootstrap4). I do not use any render. Comment in django-bookshelf project mentioned How to add bootstrap class to Django CreateView form fields in the template?, so I stick to that if it comed to forms.
I'm pretty new to Python (so Django too) and web technologies in general. I googled dozen of different questions/answers but I couldn't find any nice explanation of what is what and how to use it in real life. Most of them ended up with basic usage.
I did some experimentation on my own, but no success so far...
Here is the code
I have two models - Homes/models.py and Owners/models.py
Homes/models.py:
class Homes(models.Model):
id = models.AutoField(primary_key=True)
# other fields
some_owners = models.ManyToManyField(Owners, through='HomesOwners', through_fields=('id_home', 'id_owner'), related_name='some_owners')
# end of fields, some other code in the class like "class Meta" etc.
class HomesOwners(models.Model):
id = models.AutoField(primary_key=True)
id_home = models.ForeignKey(Homes, models.DO_NOTHING, db_column='id_home')
id_owner = models.ForeignKey('owners.Owners', models.DO_NOTHING, db_column='id_owner')
Owners/models.py do not have anything special, no imports from my Homes/models.py etc.
and my forms:
Homes/forms.py:
class HomesForm(forms.ModelForm):
def __init__(self, *args, **kwargs):
super(HomesForm, self).__init__(*args, **kwargs)
self.fields['some_field_from_homes_model'].widget.attrs = {'class': 'form-control '}
#
# --> no need self.fields for M2M, Django does the work
#
# but I tried also and have a --> Question 2
# self.fields["some_owners"].widget = forms.widgets.CheckboxSelectMultiple()
# self.fields["some_owners"].queryset = HomesOwners.objects.all()
Without any code as "self.fields" for M2M field, Django is able to generate for me list of owners.
Question 1
I would like to get list of Homes in my OwnersForms.
I do not know what to add. I assume that I cannot add
# Owners/models.py
some_homes = models.ManyToManyField(Homes, through='HomesOwners', through_fields=('id_home', 'id_owner'), related_name='some_homes')
because of circular import, am I right?
How do I get my Homes list using self.fields?
What do I need to add to my code?
Question 2
When I've added
# Homes/forms.py
self.fields["some_owners"].widget = forms.widgets.CheckboxSelectMultiple()
self.fields["some_owners"].queryset = HomesOwners.objects.all()
I got
<!-- html page -->
HomesOwners object (1)
HomesOwners object (2)
<!-- and so on... -->
How can I just list Owners?
How to filter/order them so first they would appear Owners not connected to any Home?
Question 3
class HomesOwners(models.Model):
id = models.AutoField(primary_key=True)
id_home = models.ForeignKey(Homes, models.DO_NOTHING, db_column='id_home')
id_owner = models.ForeignKey('owners.Owners', models.DO_NOTHING, db_column='id_owner')
def __str__(self):
return pass #return something
I can't get my head around this. This class connects Homes and Owners. When I'm thinking of Homes I would like to return Owners and vice versa. So it should return different things depending on what object we are using (home or owner). I think this is connected to my 2nd question about:
HomesOwners object (1)
Also...
In homes.html I'm using my M2M like that:
{% for owner in homes.homesowners_set.all %}
{{ owner.id_owner.id }}
{% endfor %}
I would like to write something similar to my owners.html and list homes. This is connected to my previous question, I would like to have full answer if that's possible.
EDIT
With the answer given to me I was able to add Homes to OwnerUpdate view. I have views like that:
owners/views.py
# List View
class OwnersList(ListView):
model = Owners
# Detail View
class OwnersView(DetailView):
model = Owners
# Create View
class OwnersCreate(CreateView):
model = Owners
form_class = OwnersForm
# Setting returning URL
success_url = reverse_lazy('owners_list')
# Update View
class OwnersUpdate(UpdateView):
model = Owners
form_class = OwnersForm
success_url = reverse_lazy('owners_list')
# Delete View
class OwnersDelete(DeleteView):
model = Owners
success_url = reverse_lazy('owners_list')
What change do I need to make to be able to show in OwnersList Homes they own?
In Homes DetailView I am able to show Owners. I would like to do the same for Homes' DetailView and Homes ListView.
I don't really get it what you asking for,
but if I understand your question correctly,
I assume you want to add Homes list (not HomesOwners list) into your Owners form, right?
you can add extra field in your form like this:
class OwnersForm(ModelForm):
# notice the queryset is 'Homes' not 'HomesOwners'
homes = forms.ModelMultipleChoiceField(queryset=Homes.objects.all(), widget=forms.CheckboxSelectMultiple)
class Meta:
model = Owners
fields = ('homes', 'your_other_fields',)
# then you can access in init function too if you want
def __init__(self, *args, **kwargs):
super(OwnersForm, self).__init__(*args, **kwargs)
self.fields['homes'].required = False
then, since it using CheckboxSelectMultiple widget, you can iterate it in your html template like this:
{% for key, value in your_form.homes.field.choices %} <!-- notice '.field.'-->
{{ key }} = {{ value }}
{% endfor %}
you probably need to create custom save too for your form.
for your question 3, it is not about the form?
If you want to show HomesOwners, you are already doing right.
{% for owner in homes.homesowners_set.all %}
{{ owner.id_owner.id }}
{% endfor %}
but it will work if that homes is only 1 object.
if homes is a queryset, you have to iterate it first
{% for home in homes %}
{% for owner in home.homesowners_set.all %}
{{ owner.id_owner.id }}
{% endfor %}
{% endfor %}
sorry if I misunderstanding your questions,
maybe you can provide your views.py too, so I or others can help you more specific
I want to display all the content from the database related to a particular ID.
I have 2 tables.
table one (enroll)
1) student id
2) name.
table 2 (courses)
1) student id
2) courses opted.
I have created a simple hyperlink for each student ID. The hyperlink redirects to another page displaying all courses opted by that student.
What I understood from basic django tutorials is that from URLs I need to pass a list of courses that correspond to the student ID.
I created 2 classes for the respective schema. I am passing list view of class courses but not able to determine the student ID.
url(r'^(?P<pk>\d+)$', ListView.as_view(
queryset=Courses.objects.all().where("-id")[:],
template_name="courses.html"))
Hello! Get student_id in self.kwargs in the method get_queryset
views.py
from your_app.models import Course
CoursesListView(ListView):
template_name = "your_template.html"
def get_queryset(self):
return Course.objects.filter(
student__id=self.kwargs.get('student_id')
)
urls.py
urlpatterns = patterns(
'',
url(
r'^your-url/(?P<student_id>\d+)/$',
CoursesListView.as_view()
)
)
your_template.html
{% for course in object_list %}
<p>{{course}}</p>
{% endfor %}
Pretty new to Django still. I have a map that the user will click on a country. I want that link to add the country name to:
URL:
url(r'^country/(?P<name>\w+)' , 'wiki.views.country',
name = 'wiki_country'),
Then the country view will open. I want to do it this way so that I can create a dynamic country view that can populate based on the name of the country, rather than individual pages served for each country. The view looks like this so far:
def country(request, name):
country = Country.objects.get(name=name)
return render_to_response("wiki/country.html") , {'country' : country})
I don't know how to take the map, or even just a text hyperlink and pass the name into the URL.
use name url patterns.
Add named urls with argument in 'href' in templates.
{% country_object.name %}
'country_object.name' is your input argument for country function.
Django Docs reference of named urls
For example, if I use filter on several foreign key like this:
list_filter = ['status', 'species__name', 'factor__name', 'factor__type', ]
There will be two filter whose name is displayed as "Name" on the admin site.
Does anyone have ideas about how to solve this? (by give them different names.)
I think django.contrib.admin.SimpleListFilter may be a solution, but considering that I have 10+ fields like xxx__name. It might be a little clumsy..
As per my debugging i found that /python2.7/dist-packages/django/contrib/admin/templates/admin/filter.html is the template which is responsible to render filter related content .
in this template you can found
{% blocktrans with filter_title=title %} By {{ filter_title }} {% endblocktrans %}
Here each and every filter's title is coming from filter_title
so to get the value of filter_title you can go to
/python2.7/dist-packages/django/contrib/admin/filters.py
Here in FieldListFilter class you can see it is directly putting verbose_name into filter.title.
Here you have
list_filter = ['status', 'species__name', 'factor__name', 'factor__type', ]
you can solve your problem by simply providing verbose name to fields which belong to other table and connected into your model as Foreignkey .
#Home here home is first model
name = models.CharField(verbose_name="Home status", --)
# Out here Out is second model
name = models.CharField(verbose_name="out status", ---)
#Main this is main model
home = models.ForeignKey(Home)
out = models.ForeignKey(Out)
so now if you will use filter it will display filter title as Home status and out status